21123310282 has 8 divisors (see below), whose sum is σ = 32421825216. Its totient is φ = 10316035212.

The previous prime is 21123310253. The next prime is 21123310283. The reversal of 21123310282 is 28201332112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21123310283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122809858 + ... + 122810029.

It is an arithmetic number, because the mean of its divisors is an integer number (4052728152).

Almost surely, 2^21123310282 is an apocalyptic number.

21123310282 is a deficient number, since it is larger than the sum of its proper divisors (11298514934).

21123310282 is a wasteful number, since it uses less digits than its factorization.

21123310282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245619932.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21123310282 its reverse (28201332112), we get a palindrome (49324642394).

The spelling of 21123310282 in words is "twenty-one billion, one hundred twenty-three million, three hundred ten thousand, two hundred eighty-two".